@kritiper “It doesn’t cost much.” There are large long-lasting indirect costs of disposal of a designer lubricant like those. When it’s something that could outlast the car in I encourage folks to have a substantiated doubt that about the quality before chucking it out.
Like if your differential got damaged in a crash or took a stray bullet, – enough so there are probably all kinds of shredded metal in there – then totally flush that thing out and replace the fluid when replacing whatever got smashed up.